Calculating-machine.



No. 878,413 PATENTED FEB. 4, 1908,

A. MULLER.

CALCULATING MACHINE.

APPLICATION FILED FEB. 27, 1904.

3 SHEETS-SHEET 1.

No. 878,413. PATENTED FEB. 4, 1908. A.- MULLER,

CALCULATING. MACHINE.

APPLICATION FILED FEB. 27, 1904.

3 SHBETS-SHEET 2.

' oz'vzay r THE NORRIS PETERS cc., WASHINGTON, n: I:

PATENTBD FEB. 4, 1908.

A. MULLER. OALG-ULATING MACHINE.

APPLICATION FILED FEB. 27, 1904.

3 SHEETS-SHEET 3.

Wz'Z nesses 1n: ucRxls PETERS co, WASHINGTON, u. 04

Cit

UNITED STATES PATENT OFFICE.

ARTHUR MULLER, OF GAUTZSOI I, GERMANY, ASSIGNOR TO LEIPZIGER PCHRENWEBKE GESELLSCHAFT MIT BESOHR-ANKTER HAFTUNG, OF LAUSEN, NEAR MARKRAUSTADT,

GERMANY.

CALCULATING-MACHINE Specification of Letters Patent.

Patented Feb. 4, 1908.

To all whom it may concern:

Be it known that ARTHUR MuLLnR, a subject of the Emperor oi Germany, whose postoflice address and residence is No. 100k Ring, Gautnsch, near Leipzig, Germany, has invented certain new and useful Improvements inCalculating-Machines; and he does hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention. relates to improvements in calculating machines in which the actual. calculating is ellected by means of reckoning disks seated on the same shaft adj aoent to one another. Each of these reckoning disks is provided with nine radial pins, which can be radially shifted, that is projected to some extent or withdrawn by means of adjusting rings rotatively arranged on the sides ol the reckoning disks. For this purpose the adjusting rings are provided with cam slots in which lateral extensions on the inner ends of the radial pins engage. Accordingly as the adjusting rings are adjusted means of ad justing arms which project through the top of the casing and. can be taken hold of, all. the radial pins of a reckoning disk can be put in or out of action, and a larger or smaller number of these pins be pushed outwards to a certain extent upon the adjustment of the arm.

When the shaft carrying the reckoning disks is rotated by a hand crank provided for the purpose those radial pins on the reckoning disks which have been projected by the adjusting rings engage and actuate tooth wheels which are loosely pivoted on a shaft mounted in a longitudinally movable case, which shaft also carries registering disks that are in turn actuated. by the wheels and which are marked with numerals O to 9, and indicate the results of the calculations. '1 The shaft also carries a series of counting disks hereinafter called revolution counters. It should be further mentioned. that each ol the adjusting rings is adapted to actuate a wheel having numbers on its periphery, which numbers are visible through an opening in the casing, only one of said numbers being visible at a time, which will thus indicate the number of radial pins that have been projected by the actuation of the adjusting rings.

As an example of the method of calculatmg with this machine suppose the following numbers are to be added. together:

After it has been ascertained that all numbers on the machine are at zero and the crank in the position of rest, the proper number is adjusted by means of the arms on the adjusting rings, that is:

1. 9824, the crank is rotated once in the forward direction.

2. v 12317, the same operation.

The result is indicated by the registering disks.

As an example of multiplication, suppose the sum of 81 l275 32 is to be calculated. This amount is the same as that of 32 equal numbers each of which is 814275. Therefore this number must be adjusted by means of the adjusting arms and the crank rotated 32 times. in the forward direction. It may however be effected in a more simple manner. After making two revolutions in the original position, the registering number case is pushed one place to the right and then three rotations made thus in all 2+3=5 rotations.

The present invention provides means for locking the adjusting rings in any adjusted position before the slightest rotary motion can be effected with the crank handle; also disks provided on their peripheries with numbers, and which may be adjusted so that the numbers thereon appear in a straight line to form the number with which the calculating operation is effected and means to retain such disks in such adjusted position during the whole period of calculation, so that a check is possible at any time and also improved means for actuating the disks or revolution counters which register the number of revolutions imparted to the shaft of the calculating disks, the actuation being effected so gently and smoothly that even when the reckoning disk shaft is rapidly rotated the disks cannot be actuated more than one unit at each revolution so that mistakes in calculation are prevented.

In the accompanying drawing one form of the invention. is shown. as an example.

Figure 1 is a longitudinal section of a calculating machine constructed according to this invention, Fig. 2 a sectional plan of the same,

Fig. 3 a transverse section, and Fig. 4 a detailed illustration of the engaging device for the registering disks.

A bolt 1) runs transversely through the whole of the reckoning disks a. is formed with raised parts 1) corresponding with the distances between the reckoning disk and is pushed into the locking position by the spring f. An arm (Z bears against the bolt 1). This arm (Z is fixed on a rod g that runs to the crank fixing device at. The rod 1 has a tendency to move in the direction of the arrow Fig. 1 under the influence of a spring 7.: or, when the crank handle m is secured in the position of rest, to be forced so far back under the action of a more powerful spring m belonging to the fixing bolt' p that the arm (Z is pressed against the bolt b This bolt and the bolt pushed so far that the raised 5 parts I) thereon are clear of the notches 'r (Fig. 3) in the adjusting rings 8. In this position of the crank the radial pins a Fig. 3 can be adjusted without difficulty by the rotation of the adjusting rings 8. The pins u as already stated operate registering disks which give the result of the calculation. If, however, after the adjusting rings 8 have been adjusted the pin 2) is pulled back out of the fastening device a to release the crank handle m for the purpose of effecting the calculation, the rod g moves outwards, causing the arm (Z to release the bolt and the bolt 1) is now slid longitudinally under the action of the spring f until the raised parts I) enter the notches r in the adjusting rings 8 and so eflect the locking thereof before the crank handle at can be turned. In addition on the back of the machine casing a longitudinally displaceable shaft h is mounted and furnished with narrow tooth wheels "L which when the crank handle m is in the position of rest engage with toothed segments g specially arranged on the adjusting rings 8 and furnished with ten teeth, so that when the adjusting rings 8 are adjusted by means of the arms 3 the corresponding wheels i are correspondingly rotated. W ith the narrow toothwheels i wider tooth wheels c engage which are pivoted loosely on the fixed shaft to and carry the disks 0 which register the calculating number. The disks 0 are each provided with numbers from O to 9, one of which numbers is visible through the opening 17 in the case. The shaft 7b is pressed in the direction of the arrow, Fig. 1 by a light spring t so that the tooth wheels i come out of range of the tooth segments 1. With the shaft 71 a two armed lever y movable on a fixed pivot 11 engages. The lower end of the lever y is connected with the rod which runs in the direction of the crank fixing device n.

hen the crank handle m is secured the bolt 79 which is mounted so as to be longitudinally displaceable therein and pressed outwards by a powerful spring m, bears against the rod 9 which oscillates the lever 1 moving the shaft 7b to such an extent to the right that the tooth-wheels i engage with the tooth segments hen the bolt p is pulled outwardly, the rod 5 is forced in the same direction by the action of the spring t on the shaft 71, which latter is connected to the rod by the lever y. \Yhen the shaft l t is thus shifted to the left, the tooth wheels '2' are moved out of mesh with the segments g, so that the wheels 1 and hence the disks 0, will not be operated during the calculating operation. Owing to the fact that the disks 0 remain quiet, the adjusted calculating number may be read during the entire period of the calculating operation. The purpose of the segments 9 is simply to impart the movement of the rings 8 to the tooth wheels '0 and the disks 0, this being done through the intermediate wheels i.

For the control of the registering disks which register the revolutions an eccentric 2 is arranged on the reckoning disk shaft Connected with the eccentric is a lever 3 provided with a guide slot 4 working on a pin 5 fiXQCl to the frame. The lever 23 is thus caused to move longitudinally and also to effect a suitable oscillating movement during the rotation of the eccentric. The free end 3 of the lever 25 is in the form of a teeth, the shape of which is suitably adapted to correspond with the notches in the wheel 6 of the revolution registering disk 7.

When the crank handle m is in the position of rest the tooth 3 belonging to the lever 23 is precisely over the middle of a tooth on the registering disk (5. Accordingly as the shaft 2 is rotated to the right or to the left the tooth 3 is forced downwards or upwards and simultaneously moved in the direction of the wheel 6 and finally the tooth I3 enters the indentation in front of or behind the particular tooth on the wheel 6 according to the direction of rotation and as the eccentric movement is continued effects the forward or backward movement of the registering disk.

There are a number of wheels 6 loosely mounted on a shaft 8 and a corresponding number of disks 7 engaging therewith loosely mounted on a shaft 11. The shafts S and 11 with their respective wheels and disks are mounted in a casing 9, which is longitudinally movable in front of the main casing in position for the wheels 6, except the one actuated by the lever to be engaged and rotated by the projected pins 11 when the disks (L are rotated by the handle in. A pawl 12 is held in engagement with each wheel 10 by a spring 13, so as to hold each wheel against accidental movement after it has been rotated so as to expose the correct number the disks standing at zero. The desired rings S are then rotated until the figures indicating the number to be computed appear at the respective openings 17. The handle m is then released, which locks the disks (1, in their adjusted positions and disengages the disks i from the rings S, and rotated one or more times, as desired. At each revolution of the shaft 2 by the handle m the pins 11. that have been projected by the rings S are caused to engage with their respective wheels 6 and thereby rotate the wheels 10 and cause the correct figures on said wheels to appear directly under the openings 15 in the casing 9. By properly manipulating the machine in this manner, examples as heretofore given may be easily worked out. The number of rotations made by the shaft 2 will be indicated by the wheel 10 that is actuated by the lever 3.

hat he claims and desires to secure by Letters Patent is 1.. In a calculating machine, the combination with the adjusting rings and operating crank handle, of a bolt formed with raised parts and adapted to lock the whole of the rings, means for locking said handle, and

mechanism connecting the bolt with the han.

dle locking means in such manner that when the handle is locked the adjusting rings are released and when. the handle is released the adjusting rings are locked.

2. In a calculating machine, the combination with the adjusting rings and operating crank handle of a bolt formed with raised parts and adapted to lock the whole of the rings, a bolt connected with said handle and adapted to lock the said handle and means for connecting the adjusting ring bolt with the handle locking bolt in such manner that when the handle is locked the adjusting rings are released, and when the handle is released the adjusting rings are locked.

3. In a calculating machine, the combination with the adjusting rings and operating crank handle of a bolt formed with raised parts and adapted to lock the whole of the rings, means for locking said handle, and mechanism connecting the bolt with the handle locking means in such manner that when the handle is locked the adjusting rings are released and when the handle is released the adjusting rings are locked, a series of counting disks arranged behind the cover of the casing and arranged to show the calculating number, toothed segments on the adjusting rings, wheels adapted to engage the segments and mounted to rotate freely on a longitudinally displaceable shaft, and means for connecting the shaft with the crank handle so that when the crank handle is released the shaft is displaceable to put the wheels thereon out of gear so that the adjusted number remains visible during the whole of the calculating operation.

4. In a calculating machine a machine frame a disk shaft 2, and a registering disk wheel 6 mounted therein, a slotted lever arranged on the machine frame between the reckoning disk shaft 2 and the registering disk wheel 6, a fixed pin 5 working in the slot in the lever and an eccentric on the shaft 2 cooperating with the pin to impart an oscillating motion to the lever in such a manner that the end of the slotted lever is moved into a notch in the registering disk wheel 6 when the eccentric moves downwards and thereupon in swinging upwards or downwards actuates the disk.

In testimony whereof he has affixed his signature, in presence of two witnesses.

ARTHUR MULLER.

Witnesses HERM. TACK, RUDOLPH FRIOKE. 

